12251990 has 16 divisors (see below), whose sum is σ = 22567248. Its totient is φ = 4786656.

The previous prime is 12251983. The next prime is 12252029. The reversal of 12251990 is 9915221.

It is a super-2 number, since 2×12251990² = 300222517920200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13817 + ... + 14676.

It is an arithmetic number, because the mean of its divisors is an integer number (1410453).

Almost surely, 2^12251990 is an apocalyptic number.

12251990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12251990 is a deficient number, since it is larger than the sum of its proper divisors (10315258).

12251990 is a wasteful number, since it uses less digits than its factorization.

12251990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28543.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 12251990 is about 3500.2842741697. The cubic root of 12251990 is about 230.5342966049.

The spelling of 12251990 in words is "twelve million, two hundred fifty-one thousand, nine hundred ninety".